memEx/lib/memex_web/telemetry.ex

100 lines
3.1 KiB
Elixir
Raw Permalink Normal View History

2022-07-25 19:31:54 -04:00
defmodule MemexWeb.Telemetry do
2022-01-22 20:44:38 -05:00
@moduledoc """
2022-02-25 21:55:17 -05:00
Collects telemetry
2022-01-22 20:44:38 -05:00
"""
2021-03-11 21:12:55 -05:00
use Supervisor
import Telemetry.Metrics
def start_link(arg) do
Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
end
@impl true
def init(_arg) do
children = [
# Telemetry poller will execute the given period measurements
# every 10_000ms. Learn more here: https://hexdocs.pm/telemetry_metrics
{:telemetry_poller, measurements: periodic_measurements(), period: 10_000}
# Add reporters as children of your supervision tree.
# {Telemetry.Metrics.ConsoleReporter, metrics: metrics()}
]
Supervisor.init(children, strategy: :one_for_one)
end
def metrics do
[
# Phoenix Metrics
summary("phoenix.endpoint.stop.duration",
unit: {:native, :millisecond}
),
summary("phoenix.router_dispatch.stop.duration",
tags: [:route],
unit: {:native, :millisecond}
),
# Database Metrics
2022-07-25 19:31:54 -04:00
summary("memex.repo.query.total_time",
2022-01-22 13:01:36 -05:00
unit: {:native, :millisecond},
description: "The sum of the other measurements"
),
2022-07-25 19:31:54 -04:00
summary("memex.repo.query.decode_time",
2022-01-22 13:01:36 -05:00
unit: {:native, :millisecond},
description: "The time spent decoding the data received from the database"
),
2022-07-25 19:31:54 -04:00
summary("memex.repo.query.query_time",
2022-01-22 13:01:36 -05:00
unit: {:native, :millisecond},
description: "The time spent executing the query"
),
2022-07-25 19:31:54 -04:00
summary("memex.repo.query.queue_time",
2022-01-22 13:01:36 -05:00
unit: {:native, :millisecond},
description: "The time spent waiting for a database connection"
),
2022-07-25 19:31:54 -04:00
summary("memex.repo.query.idle_time",
2022-01-22 13:01:36 -05:00
unit: {:native, :millisecond},
description:
"The time the connection spent waiting before being checked out for the query"
),
2021-03-11 21:12:55 -05:00
2023-02-04 20:48:17 -05:00
# Oban Metrics
counter("oban.job.exception",
tags: [:queue, :worker],
event_name: [:oban, :job, :exception],
measurement: :duration,
description: "Number of oban jobs that raised an exception"
),
counter("oban.job.start",
tags: [:queue, :worker],
event_name: [:oban, :job, :start],
measurement: :system_time,
description: "Number of oban jobs started"
),
summary("oban.job.stop.duration",
tags: [:queue, :worker],
unit: {:native, :millisecond},
description: "Length of time spent processing the oban job"
),
summary("oban.job.stop.queue_time",
tags: [:queue, :worker],
unit: {:native, :millisecond},
description: "Time the oban job spent waiting in milliseconds"
),
2021-03-11 21:12:55 -05:00
# VM Metrics
summary("vm.memory.total", unit: {:byte, :kilobyte}),
summary("vm.total_run_queue_lengths.total"),
summary("vm.total_run_queue_lengths.cpu"),
summary("vm.total_run_queue_lengths.io")
]
end
defp periodic_measurements do
[
# A module, function and arguments to be invoked periodically.
# This function must call :telemetry.execute/3 and a metric must be added above.
2022-07-25 19:31:54 -04:00
# {MemexWeb, :count_users, []}
2021-03-11 21:12:55 -05:00
]
end
end